Emery-wheel-dressing tool.



PATENTED JULY 24, 1906.

E. WRIGHT. EMERY WHEEL DRESSING TOOL.

APPLICATION FILED APR.9.190G.

' UNITED STATES P grEur OFFICE. EDWARD WRIGHT, OF WORCESTER, MASSACHUSETTS. EMERY-WHEEL-DRESSING TOOL.

Specification of Letters Patent.

Patented July 24, 1906.

Application filed April 9, 1906- Serial 110.310.668-

reference being made therein to t e accompanying drawings.

My present invention relates to certain features of construction and to the combination and embodiment of the same in an instrument of the class specified for truing or dressing off emery-wheels and the like, the object being to render the instrument of greater efficiency and more convenient and easy for operation.

The particular features of invention claimed are set forth in the following detailed description and definitely pointed out in the summary.

In the drawings, Figure 1 re resents a side view of my improved emery-w eel dresser as i 'applied to use. Fig. 2 is a top view, the end ortion of the handle -lever being omitted.

ig. 3 is a bottom view of the same with the roller and its supporting-ears shown in section at the position of line X X on Fig. 4. Fig. '4 is a vertical transverse section at line Y Y on Fig. 2 looking toward the head. Fig. 5 shows a separate side view and edge view of one of the cutter-disks employed in the dressing-roller, and Fig. 6 shows a separate side view and section of one of the washers em-,

ployed in the dressing-roller.

Referring to the drawings, A indicates the handle-lever or frame, comprising a head portipn 2 and a hand-grip portion 3 of suitable s a e.

C indicates the dressing-roller, and D its supporting axle or pin.

In accordance with my invention the fork or cars a and a for supporting the axis-pin D are arranged in a downwardly-offset relation in respect to the plane of the handle-lever, the space for the roller C being wholly below the level of the head 2. Said ears are parallel with each other at the sides of the rollerspace and are best somewhat forwardly inc ined at'their lower ends, and the roller C runs loose upon the. axis-pin D, mounted between the ears near their lower extremities.

The dressing-roller or cutter-roll C is composed of aseries of thin spring-steel disks 5 cut from about No. 17 gage sheet-steel, and a Series of adjacent washers 6 of less diameter than the disks, said disks and washers being alternately arranged upon a tubular bushing 7, that extends through their central opening 8 and has its ends riveted slightly for securely confining the parts together. The disks and washers are provided with an eccentricallydisposed recess or opening 9 to accommodate a wire pin 10, whereby the entire series of disks and'washers are caused to rotate in The cutter-disks 5 are corrugated laterally at their outer edges, and being formed of spring-steel of such thin gage and properly tempered they will spring or yield somewhat under the strain and pressure to which they are subjected when in operation. This yielding action increases their effectiveness in dis integrating the material of the wheel to be trued or dressed off.

The axis-pin D consists of a cylindrical body with conical or suitable centering end surfaces 13. v with a screw-threaded opening 12, through which the axis-pin D can pass, and the other car a is provided with a cavity or opening 14, havin an internal shoulder 15 to match the end 0% idly in position by means of a screw-plug 16, threaded into the opening 12 and having its inner end formed with a cavity or means that One of the'ears a, is provided the pin D. The axis-pin is held rigcenters and supports the end of the axis-pin.

(See section, Fig. 3.) The small opening 14 through the ear a permits of the pin D being driven out with a pin-punch when the screw 16 is removed to facilitate replacement of cutter-rollers when required.

Upon the under side of the head or neck portion of the handle-lever adjacent to the downwardly-offset ears I provide a seating or bearin surface 20 and an approximately upright s oulder 21, extending crosswise of the bar. The surface 20, extendin the full width of the head, is rounded or s aped as a transversely-disposed cylindrical segment, thus affording a rockable fulcrum-seat for sustainin the instrument when inuse upon the top 0 the tool-rest R. (See dotted lines, Figs. 1 and 4.) The rounded surface 20 permits lateral rocking of the tool upon the rest as desired. The shoulder 21 is slightly curved horizontall as best indicated in Fig. 3, to permit a slig t swinging of the handlelever sidewise, right or left, to force one edge of the roller against the wheel-face with more pressure than the other. The shoulder serves to keep thetool from slipping back on the rest R when crowding the cutters against riphery of the emery-wheel W, operated upon their work.

By the offset construction of the heads or;-

ears the roller and its axis are disposed below the level of the hilcruimbearing', when in use the roller contactswith the pe at a position some distance below a'radial line L drawnfroirn the center of the wheel to,

the fulcrum-point, the offset of the roller supporting ears being in the direction in which the wheel W is revolved. This con-.

- 'Si3I 1l0l3lOI1 renders the tool practically self balancing and also effects an undercut action.

I rapidand efficient manner than wouldotherwise be-efiected. 4

What I claim as of invention, anddesire to secure by Letters Patent, 1s-- 1. An emery-wheel dressin tool, comprising ahandle-lever with its ead andproectin ear members forming a depending anglelever extension thereto, a fulcrum-seat forming a. transversely-extended rocker-sur face on the under side of said lever-head, and

a dressing-roller mounted in said ear mem-.

, bers with its axis and-working face below the level-1 of said fulcrum-seat, substantially as.

shown and described.

2.v A hand-tool for-dressing emery-wheels,

' 'consistin ofahandled bar havin u on the said fulcrum bearing-seat,

under side of its head a rockab e ulcrum bearing seat or surface, and provided with downwardly-oilset ear members adj acent to the cutter-roller and cutter-roll axis supported in saidear members and disposed below the plane of the handled bar and its fulcrum bearing-seat for effecting an angle-leveraged undercut-contact with the Work, substantially as and for the purpose set forth; i

3. In an instrument of the character described, the handle-lever having its furcated head formed with downwardly-oflset ear members, a transverse convex bearing or fol-1 crum seat on the under side of and extending so that lower ends,

beyond the width 'conicall'y-end'ed recess in one ear, 'posite end supported by an axial bearing- 7 In an emery-w the f ull rwidth of the head; and'ashoulder adjacent to the offset; in combination with the A,

drcssing roller mounted within-the head, its bearing-axle supported in the lower ends of the said ofisetear members, and working below a line radial from the wheel-center through the fulcrum bearing-point, substantially asset forth, I I

4. In an emery-wheel'dresser, a cutterroller composed of a series of corru ated spring-disks and separating-washers 0 less diameter, in combination with a central tubular bushing connecting the same, a supporting-axle, and means consisting of an cecentrioally-disposed wire pin assing through said disks and washers paral el with the axis for confining the spring-disks and'washers to rotate in unison on the axle.

5. An emery-wheel dresser, comprising a handle-bar having at the rear end a .broadened hand-grip portion, and provided at its head withdownwardly-extended ears, the

cutter-roller axis carried therein near their under side of the neck that extends laterally of the cutter-roller adjacent to said ears, and positioned above the plane of the roller, for the purpose set forth,

6. In an emery-wheel dresser, the combination with the handle-frame having downwardly-offset ears, and the dressing-roller; of

a pointed axis-pinhaving one end fitted in a and its opscrewhaving a conical recess fitting the end of the pin, and externally threaded into an opening withinthe opposite ear.

eel dresser, the combiand a bearing-surface upon the nation with the handle-lever havingthe furcated head, and the rotatable dressing-roller, of an axis-support for saidroller, consisting of ahardened cylindrical pin having conical end faces, a cavit formed in one member of the furcated hea having a beveled interior shoulder fitting the pin, a screw-threaded opening formed in the opposite member of the head, and a screw-plug fittingin said opening and having its-inner end cup-shaped for retaining the axis p'in and clamping it endwise against the shoulder by the opposite member.

- Witness my hand this 5th day of April,

EDWARD WRIGHT.

Witnesses:

CHAS. H. BURLEIGH, W. A. HARRINGTON. 

